Geologic setting of the Glacier Peak and Mazama ash-bed markers in west-central Montana / 
by R. W. Lemke ... [et. al.] 
 - Washington, D.C. :  United States Geological Survey,  1975 
 - iv, 31 p. :  ill. ;  24 cm. 
 - Contributions to stratigraphy .
 - Geological Survey bulletin ; 1395-H .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Quaternary<br/>Volcanic ash, tuff, etc.--Montana<br/>Geology--Montana
<br/><br/><label>Dewey Class. No.: </label>552.20978652